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Seasonal incidence of insects and diseases on okra (Abelmoschus esculentus) crop in zoba Anseba

Author Affiliations

  • 1Department of Plant Protection, Hamelmalo Agricultural College, ERITREA

Int. Res. J. Biological Sci., Volume 4, Issue (1), Pages 71-74, January,10 (2015)


Okra (Abelmoschus esculentus) is one of the important vegetable crops of Eritrea and many insect pests and diseases infest the crop from germination up to harvesting. The field trail was conducted at Hamelmalo Agricultural College in okra crop to study the seasonal incidence of pest and diseases. Insects such as aphid, leafhopper, spotted bollworm and dusky cotton bug were noticed on the crop whereas plant diseases like powdery mildew and okra blight infested the crop. The maximum average population of aphids/plant was 143 with (r = 0.452) and its population increased from December to March. The jassid population was non-significantly affected the okra but maximum population (13 leafhoppers/plant) was recorded during February. The maximum number of spotted bollworm was 7 larva?/plant. The dusky bug population was 0.6 and 11 per plant during February and March, respectively. The natural enemies, lady bird beetle and sirphid fly, were recorded but their population were non-significant with (r=0.800) and (r = 0.316) with maximum and minimum temperature. The incidence of powdery mildew and okra blight appeared during February and their severity increased till harvesting period. The overall disease complexes were found 85% per plant.


  1. Siemonsma J.S., Laculturedugombo (Abelmoschus spp.) legume fruit tropical avec reference special alacoted’ivoire thesis Univ. of Wageningen, the Netherlands, (1982)
  2. Ministry of Agriculture, Annual vegetable production and consumption in Eritrea, (2008)
  3. Nayar K.K., Ananthakrishnan T.N. and David B.V., General and Applied Entomology, Tata McGraw-Hill Publishing Company Ltd, New Delhi, 589 (1976)
  4. Berger R.D., Measuring disease intensity, In: Teng, P.S., S.V. Krupa (eds.): Crop Loss Assessment, Proc. E.C. Stakman Commem. Symp. Misc. Publ. 7, Agric. Exp. Stn, 28-31 (1980)
  5. Anitha K.R., Seasonal incidence and management of sucking pests of okra. M.Sc. dissertation, University of Agricultural Sciences, Dharwad : (2007)
  6. Patel I.S. and Rote N.B., Seasonal incidence of sucking pest complex of cotton under rainfed condition of southern Gujarat, Gujarat Agric. Univ. Res. J., 21(1),127-129 (1995)
  7. Jayaswal A.P. and Sundaramurthy V.T., Achievements in insect management in cotton. All India Coordinated Crop Improvement Project Achievements, 117-151 (1992)
  8. Senapati B. and Mohanty G.B., A note on the population fluctuation of sucking pests on cotton, Madras Agric. J., 67(7), 624-630 (1980)
  9. Kumar K.K. and Urs K.C.D., Population fluctuation of Earias vitella (Fab.) on okra in relation to abiotic factor, Ind. J. Pl. Protec., 16(2), 137-142 (1988)
  10. Ahmad S., Gupta S.C., Prakash N. and Mandal S.K., Weather factors and larval population of Earias vitellaFabr. in summer sown okra (Abelmoschus esculentus L.), J. Res. Birsa Agri. Univ., 12(2), 215-217 (2000)
  11. Anjorin S.T., Jolaoso M.A. and Golu M.T., A survey of incidence and severity of pests and diseases of okra Abelmoschus esculentus L. Moench) and egg plant Solanum melongena L.) in Abuja, Nigeria, American J. Res. Comm., 1(11), 333-349 (2012)
  12. Anand S. and Anil S., Effect of some weather parameters on the development of powdery mildew (Erysiphe polygoni) in black gram, Pl. Dis. Res., 18(1), 63-64 (2003)
  13. Singh A.K., Evaluation of fungicides for the control of powdery mildew disease in coriander (Coriandrum sativum L.), J. Spices and Aromatic Crops 15(2), 123-124 (2006)
  14. Aust H.J. and Jurgen H.H., Microclimate in relation to epidemics of powdery mildew, Ann. Rev. Phtopathol., 29, 144-145 (1986)
  15. Dinesh B.M., Studies on powdery mildew of sunflower caused by Erysiphe cichoracearum DC. M.Sc. thesis submitted in Drawad Agri. Univ., 1-86 (2009)